EOC Milestone practice 9th grade biology Pt.1
Scientists recently developed a technique for synthesizing proteins outside of cells.These cell-free systems are used to produce pure proteins that can be used in many ways.One use is in the manufacturing of medicine.Use the drop-down menus to construct an ethical question that should be considered before using cell-free systems to manufacture medicine. Do cell-free systems the cost of producing some medicines so that more the medicine?
Do cell-free decrease systems the cost of producing some medicines so that more people can afford to buy the medicine?
cynical
A. The Chromosomes in cell 1 are the same as in cells 6 and 7.
Geographic isolation caused separation of rainforest frog populations into a population in the north and a population in the south.The separated populations later reconnected because the climate became wetter and warmer,causing the rainforest to expand.When males from the north mated with females from the south mated with females from the south,the offspring failed to develop past the tadpole stage.When males from the south mated with females from the north,the offspring developed more slowly than the offspring of pairs of northern frogs.Based on the data,which event occurred while the two populations of frogs were separated?
A.The two populations developed into new species.
Scientists studied a species of phytoplankton.These phytoplankton are an important part of marine food webs and are major primary producers.As all organisms are regulated by their environment.so are the phytoplankton.The scientists looked at the relationship between the populations of the phytoplankton and viruses found in the same environment.They created three environments in a laboratory setting to collect data on the numbers of phytoplankton and viruses over a period of time and graphed the results once they were averaged,as shown below.The scientists claimed that the growth and stability of the phytoplankton were affected by the viruses.Using the information given,which two arguments support this claim?
D.As the phytoplankton population reached capacity,the number of viruses began to increase because the phytoplankton population reached capacity,the number of viruses began to increase because the phytoplankton were the hosts to the viruses and replicated the viruses genome. F.The phytoplankton population decreased as the number of viruses increased because the cells of the phytoplankton were destroyed as the viruses used them to increase the number of viruses in the environment.
Today,the common type of banana we buy and eat is a Cavendish banana.They arose from chance mutants that were produced sexually from wild banana plants.The Cavendish banana is infertile and can only be produced by cloning from root shoots.Large commercial growers worldwide now plant only the mutant type.Some information about both types of banana is recorded in the table.Part A.Why are scientists warning that exclusively growing this mutant type by asexual reproduction presents a serious disadvantage? Part B.Growers on large banana farms that supply food commercially have chosen to limit their plantings exclusively to Cavendish banana plants.What advantage is likely cited by the growers for continued planting of these asexually produced crops year after year?
Part A.The lack of genetic variability among clones puts the whole species at increased risk of extinction through a catastrophic disease or pest. Part B.The bananas produced maintain consistent characteristics in quality,taste,and appearance from one crop of clones to the next.
